AUTHOR=Zhang Qiu-Yue , Liu Hong-Gao , Bian Lu-Sen , Chen Qian 

TITLE=Two new species of Scytinostroma (Russulales, Basidiomycota) in Southwest China

JOURNAL=Frontiers in Cellular and Infection Microbiology

VOLUME=13

YEAR=2023

URL=https://www.frontiersin.org/journals/cellular-and-infection-microbiology/articles/10.3389/fcimb.2023.1189600

DOI=10.3389/fcimb.2023.1189600

ISSN=2235-2988

ABSTRACT=<p>Two new species of <italic>Scytinostroma</italic> viz. <italic>S. acystidiatum</italic> and <italic>S. macrospermum</italic>, are described from southwest China. Phylogeny based on ITS + nLSU dataset demonstrates that samples of the two species form two independent lineages and are different in morphology from the existing species of <italic>Scytinostroma</italic>. <italic>Scytinostroma acystidiatum</italic> is characterized by resupinate, coriaceous basidiomata with cream to pale yellow hymenophore, a dimitic hyphal structure with generative hyphae bearing simple septa, the absence of cystidia, and amyloid, broadly ellipsoid basidiospores measuring 4.7–7 × 3.5–4.7 μm. <italic>Scytinostroma macrospermum</italic> is characterized by resupinate, coriaceous basidiomata with cream to straw yellow hymenophore, a dimitic hyphal structure with generative hyphae bearing simple septa, numerous cystidia embedded or projecting from hymenium, and inamyloid, ellipsoid basidiospores measuring 9–11 × 4.5–5.5 μm. The differences between the new species and morphologically similar and phylogenetically related species are discussed.</p>